HI, thanks for using healthcare magic
Stress can make reflux symptoms worse as you mentioned.
Though zantac can be effective for reflux, it would be best to use a medication from the
proton pump family of medication.
The medication from the proton pump family would suppress acid production more than the zantac.
Examples include nexium,
prilosec,
prevacid,
aciphex, protonix
Changing your diet would also help eg: (A) small meals frequently rather than large meals
(b)avoiding any spicy , citrus, fatty or fried foods
(c)reducing intake of tomatoes, onions, caffeine products
In terms of a
stomach ulcer, this would cause severe persistent pain usually in the upper middle part of the stomach.
Reflux would not typically cause pain in the LUQ, so you may need to see your doctor to determine the cause of this pain
I hope this helps